I was thinking about something in this category:
Jek Porkins (34)
X-Wing (26), R5-D8 (3), Expert Handling (2), Experimental Interface (3)
In this version Piggy would simply always say no to stress and take the possible damage. Then during your turn he would be able to possibly repair a damage with R5-D8, plus take another action with Experimental interface and deny the stress again.
Expert handling just works like a barrel roll in order to arc-dodge if he can, and with the stress being denied again, you could even use the Interface afterwards for another free action.
Okay, i am not saying that it's super effective, but it's pretty funny as a combo.
Another one:
Jek Porkins (35)
X-Wing (26), R5-D8 (3), Push the Limit (3), Experimental Interface (3)
Here Piggy would get some more punch and lose some mobility. I don't know if this actually permits you 3 actions or if for some reason it wouldn't work. Normally you would focus, then get a Target Lock via PtL. You deny the stress with Piggys ability, and off the last action you performed you trigger Experimental interface to make R5-D8 repair something if you took damage. Then you can again deny the stress with Piggys ability. Right? Or am i overlooking something?
Do you have any better idea how to use him? Let me know it please!